Manual Robbe Futaba FX-40 (page 62 of 105) (English)

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Model menu

Programmable mixers

FX-40

appropriate field, and select your preferred transmitter con-

trol in the menu which then appears. Any of the auxiliary

transmitter controls can be used. Your selected control is

displayed in the field, as shown in the screen shot.

Next you should define the operating mode for the trans-

mitter control you have chosen; the mode is selected using

the standard procedure: mark the field containing the sym-

bol indicating the effect of the transmitter control. Each time

you mark it, the effect mode changes. Four modes are avai-

lable in total, and their method of working is displayed in

schematic form on the screen. This is the key to the sym-

bols:

The mixer rate is 0% when the transmitter control is

in the centre position. Moving the transmitter control

to right or left increases and reduces the value respectively.

The mixer rate is 0% at the left end-point of the

transmitter control. Moving the transmitter control

to the right increases the value.

The mixer rate is 0% at the right end-point of the

transmitter control. Moving the transmitter control

to the left increases the value.

The mixer rate is 0% when the transmitter control

is in the centre position. Moving the transmitter

control to right or left always increases the value.

(the symbol for the associated transmitter control is also

displayed.)

When you have selected a transmitter control for the pur-

pose of fine-tuning, and chosen your preferred mode, you

have to define an effect range for the fine-tuning: mark the

right field in the ‘Fine-tuning’ frame, and a set of arrow but-

tons appears at the right margin of the screen. These are

used to determine the effect range in the form of a percen-

tage. The set value is displayed in the appropriate field.

You can now change the mixer setting within the pre-set

range by operating the selected transmitter control; the cur-

rently set value is displayed in brackets below the field. At

the same time a fine line is superimposed on the pro-

grammed curve to indicate the alteration to the curve cau-

sed by the fine-tuning adjustment.

Once you have established the optimum value by adjusting

the fine-tuning control during test-flights, that value can be

stored in a similar way to the ‘Trim memory’ function: mark

the ‘Mem.’ field, then answer the subsequent security query

with ‘Yes’. The fine-tuning value is then accepted, the curve

shape changes accordingly, and the transmitter control for

fine-tuning can be reset to 0%.

• Adjusting mixer values and / or the mixer curve

The first step is to define the curve type. Mark the field

which displays the name of the curve type, and select your

eferr

ed type in the menu which then appears.

The following curve types are available:

Linear: linear curve

EXP1: exponential curve (curve 1)

EXP2: exponential curve (curve 2)

VTR: curve for 3-D aer

obatics

LINE: straight 9-point (2- … 17-point) curve

Curve: 9-point curve (2- … 17-point) curve with tur

n points

Mark your pre-

erred curve

type to activate

it, and it is dis-

played in gra-

phic form. This

example shows

part of a screen

shot displaying

a linear curve.

The settings can be defined separately for both sides of the

curve (Rates A and B): mark the appropriate field and use

the arrow buttons to alter the value in it.

The curve can be shifted both vertically (OFFSET) and also

to left or right (X-OFFSET). This is achieved by marking the

corresponding field and entering an offset value using the

arrow buttons. Positive values move the curve up or to the

right; negative values down or to the left. Each change in

the curve is immediately displayed on-screen in graphic

form, so you can always see the net effect of the curve pro-

gramming you carry out.

The method of programming a mixer curve is exactly the

same as the procedure for setting up Dual Rate curves (see

page 58).

• Programming an Offset mixer

This type of mixer is typically used to pass a fixed value to a

particular function when the mixer is trigger

ed by operating

a switch. This means that Of

fset mixers do not require a

Master channel. These mixers are activated using the same

method as described for mode switching (see page 59).

If you set ‘Offset mixer’ mode and mark the field which is

used to access the adjustment process, the screen will look

like this:

First determine the ‘Slave’ channel or channels, i.e. the

channel into which a fixed value is to be mixed. Up to four

functions can be operated in this way. The functions can be

selected once you have marked the corresponding field in

the function select menu which now appears. Mark the des-

ired function, and leave the sub-menu by pressing ‘End’.

Your selection is now displayed in the ‘Slave’ column.

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Robbe Futaba FX-40 Manual

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